If you're asking if (for example) the interface for a Cisco managed switch is the same as a FortiNet managed switch interface, then the answer is no. That's not to say that NOTHING is the same as Cisco though.
) Many of the major brands have their own platform, GUI, command syntax... everything, while a majority of the smaller ones just use open source or Cisco similar platforms.
Humans are the only creatures that won't live up to the their potential. Give everything your all. When you die, die on E.
So I ask you, what do you intend to do now?